Fifth Generation | 1971–1976

The fifth generation of the Impala continued to be Chevrolet’s top-selling model. It featured a high-performance Turbo-Jet 454 V8 engine, although power decreased over the years. The 1971 redesign introduced the largest car ever offered by Chevrolet, with a sleek semi-fastback design reminiscent of the 1961 “bubbletop” styling. A three-speed manual transmission was initially standard but later replaced by Turbo Hydra-Matic for V8-equipped models. These large B-body Chevrolets boasted luxury features, styling, and a smooth ride, similar to Cadillac. However, the power ventilation system introduced in these models faced issues and was not well-received by buyers.

In 1972, the Impala received a new grille that extended below the bumper. V8 engines dominated the powertrain options, with the 350 2bbl V8 becoming the standard engine from 1973 to 1976. The best-selling body style was the formal-roof Custom Coupe. All engines were designed to run on unleaded gasoline starting in 1972. The 1973 models featured larger shock-absorbing front bumpers and new taillights mounted in the rear bumper. The convertible was moved to the Caprice Classic series, and improvements were made to the suspension and frame for better roadability. The following years saw further refinements, such as color-keyed interiors, improved ventilation systems, and revised front end designs. Notably, in 1974, a Spirit of America package was offered as an appearance option on Sport Coupe models.

In 1975, the Impala received a carried-over Caprice front end with grille insert and emblem changes. The Caprice model itself underwent revisions with a new front end, hood, and fenders. The interior saw updates to upholstery, door panels, and the dashboard. Additional features were introduced, including a High Energy Ignition (HEI) system and catalytic converters. The full-size Chevrolet convertible was discontinued after 1975, and four-door models received new rooflines. The 2-door hardtop model was discontinued in 1976, leaving the redesigned Custom Coupe as the sole 2-door Impala option. The 1976 Impalas featured a previous year’s Caprice nose with a new grille insert. A lower-priced Impala “S” model was offered for fleet buyers, replacing the Bel Air in the U.S. market.